If your blood pressure reading is high, what you should do depends entirely on how high it is. A reading above 180/120 with symptoms like chest pain, blurred vision, or confusion is a medical emergency requiring a 911 call. Anything below that threshold gives you time to bring your numbers down through a combination of immediate calming techniques and longer-term lifestyle changes.
Know Your Numbers First
Before you act, make sure your reading is accurate. A single high number on a home monitor doesn’t necessarily mean you have a problem. Caffeine, a full bladder, or even sitting with your legs crossed can inflate your reading by several points. For a reliable measurement, sit quietly for five minutes with your back supported against a chair, your feet flat on the floor, and your arm resting on a table at heart level. Place the cuff on bare skin, not over a sleeve. Take two readings one to three minutes apart, and use the average.
The 2025 guidelines from the American Heart Association and American College of Cardiology define the categories like this:
- Elevated: 120 to 129 systolic and less than 80 diastolic
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic
- Hypertensive crisis: above 180/120
If you’re in the elevated or Stage 1 range, lifestyle changes alone can often bring you back to normal. Stage 2 typically calls for a conversation with a healthcare provider about whether medication makes sense alongside those changes.
When a High Reading Is an Emergency
A reading above 180/120 is considered severe hypertension. If that number comes with any of the following symptoms, call 911 immediately:
- Chest pain or shortness of breath
- Blurred vision or other vision changes
- Confusion or difficulty speaking
- Numbness or tingling, especially on one side of the body
- Severe nausea or vomiting
- Trouble walking
These are signs of a hypertensive crisis, meaning your blood pressure is high enough to damage organs in real time. If you get a reading above 180/120 but feel fine, wait five minutes and measure again. If it’s still that high, contact your doctor’s office or an urgent care line for guidance, even without symptoms.
What You Can Do Right Now
If your reading is elevated but not in crisis territory, slow breathing is the fastest tool available. Slowing your breath to about six to ten breaths per minute, with a longer exhale than inhale, activates your body’s relaxation response and can lower systolic pressure within minutes. Practicing this for 15 minutes a day has been shown to reduce systolic blood pressure by up to 10 points over time.
A handheld device that adds resistance to your breathing (called inspiratory muscle strength training) produced an average 9-point drop in systolic pressure within six weeks in a well-designed trial, using just 30 breaths a day. These devices cost less than $20 online. A more advanced option is the FDA-cleared Resperate device, which uses a chest sensor and audio cues to guide your breathing rate down gradually.
Beyond breathing, a few other things can help in the short term: move to a quiet space, sit or lie down, and avoid caffeine or alcohol. If you’re stressed or anxious, that alone can push your reading 10 to 15 points higher than your true resting pressure. Give yourself time to settle before rechecking.
Dietary Changes That Make the Biggest Difference
The single most effective dietary strategy for lowering blood pressure is the DASH diet, which emphasizes fruits, vegetables, whole grains, lean protein, and low-fat dairy while minimizing saturated fat and sweets. In clinical trials, people following the DASH diet saw their systolic blood pressure drop by nearly 12 points on average. That’s comparable to what some medications achieve.
Sodium reduction is a major piece of the puzzle. The American Heart Association recommends staying under 2,300 milligrams of sodium per day, with an ideal target of 1,500 milligrams for people with high blood pressure. Most of the sodium in a typical diet comes from processed and restaurant food, not the salt shaker. Reading labels and cooking more meals at home are the most practical ways to cut back.
Potassium works as a natural counterbalance to sodium. It helps your kidneys flush excess sodium out and relaxes blood vessel walls. The AHA recommends 3,500 to 5,000 milligrams of potassium daily, ideally from food rather than supplements. Bananas get all the credit, but potatoes, beans, spinach, avocados, and yogurt are all potassium-rich. If your diet falls short, a healthcare provider may suggest a moderate-dose supplement.
Exercise: How Much and How Soon It Works
Regular aerobic exercise, things like brisk walking, cycling, or swimming, lowers blood pressure by 4 to 10 points systolic and 5 to 8 points diastolic. The target is 150 minutes of moderate activity per week, spread across most days. You don’t need to carve out a full 30-minute block. Three 10-minute sessions throughout the day deliver the same benefit.
The timeline matters if you’re feeling impatient. It typically takes one to three months of consistent exercise before you see a lasting change in your blood pressure readings. That doesn’t mean nothing is happening sooner. Each individual session temporarily lowers pressure for several hours afterward, a phenomenon called post-exercise hypotension. But the structural changes in your blood vessels and heart that produce a permanent shift take weeks to develop. Consistency matters far more than intensity.
How Weight Loss Affects Your Numbers
If you’re carrying extra weight, losing even a modest amount has a measurable effect. A meta-analysis of randomized trials found that blood pressure drops by about 1 point systolic and 1 point diastolic for every kilogram (roughly 2.2 pounds) lost. That means losing 10 pounds could reduce your systolic pressure by 4 to 5 points, and those reductions stack on top of the gains from diet and exercise.
You don’t need to reach an “ideal” weight to see benefits. Even 5 to 10 percent of your starting weight is enough to produce clinically meaningful changes in blood pressure, cholesterol, and blood sugar.
When Lifestyle Changes Aren’t Enough
For people with Stage 1 hypertension and no other cardiovascular risk factors, lifestyle changes are the first line of treatment. But if your readings consistently sit at 140/90 or higher (Stage 2), or if you have Stage 1 hypertension alongside conditions like diabetes, kidney disease, or a history of heart attack or stroke, medication is typically part of the plan.
Blood pressure medications work through several different mechanisms: some relax your blood vessels, some reduce the volume of fluid in your system, and others slow your heart rate. Most people start on one medication, and it may take a few weeks to find the right type and dose. The goal for most adults is to get below 130/80 consistently. Medication works best when paired with the same lifestyle changes described above, not as a replacement for them.
If you’ve been prescribed blood pressure medication and your readings are still high, the most common reason is missed doses. Taking it at the same time every day, ideally tied to a routine like brushing your teeth, makes a significant difference in long-term control.